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Chiral MOFs functional material as well as preparation method and purpose thereof

A functional material and chirality technology, which can be applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. good stability

Active Publication Date: 2019-10-01
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on chiral MOFs for selective absorption and resolution of racemic amino acids

Method used

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  • Chiral MOFs functional material as well as preparation method and purpose thereof
  • Chiral MOFs functional material as well as preparation method and purpose thereof
  • Chiral MOFs functional material as well as preparation method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Prepare a chiral MOFs functional material, the metal of which is zinc salt, the specific preparation method is: weigh 0.9mmol (0.27g) zinc nitrate hexahydrate and 0.9mmol (0.15g) L-phenylalanine dissolved in 2.5mL deionized water to get solution A, weigh 0.9mmol (0.16g) 1,2-bis(4-pyridyl)ethylene and dissolve it in 7.5mL anhydrous methanol to get solution B, mix solution A and solution B evenly Transfer to a reaction kettle with a polytetrafluoroethylene lining, and then place the reaction kettle in a muffle furnace for crystallization at 120°C for 72 hours. After the reaction, use programmed cooling (programmed cooling helps crystal growth). The reactor was cooled to room temperature, then filtered, washed three times with fresh methanol / water mixture with a volume ratio of 3:1, then washed three times with fresh anhydrous methanol, and finally dried in vacuum at 60°C for 24 hours to obtain orange crystals. Sexual MOFs functional materials. It has been verif...

Embodiment 2

[0028] Applicant compared with Cu 2+ As the ion source, chiral MOFs were prepared with L-phenylalanine and 1,2-bis(4-pyridyl)ethylene as ligands. The specific preparation method was: weigh 0.9mmol (0.18g) copper acetate monohydrate and 0.9mmol (0.15g) of L-phenylalanine were dissolved in 2.5mL of deionized water to obtain solution C, and 0.9mmol (0.16g) of 1,2-di(4-pyridyl)ethylene was weighed and dissolved in 7.5mL of anhydrous Solution B was obtained in methanol, and solution C and solution B were mixed uniformly and then transferred to a reaction kettle, and then the reaction kettle was placed in a muffle furnace for crystallization at 120°C for 72 hours, and then the reaction kettle was cooled to room temperature using a temperature program. No crystals were precipitated out in the reactor.

Embodiment 3

[0030] The applicant also compared with Co 2+ As an ion source, chiral MOFs were prepared with L-phenylalanine and 1,2-bis(4-pyridyl)ethylene as ligands. The specific preparation method was the same as in Example 2, and the difference from Example 2 was only The reason is to replace copper acetate monohydrate with 0.9 mmol (0.26 g) of cobalt nitrate hexahydrate. After cooling the reactor, it was found that no crystals grew in the mixed solution.

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PUM

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Abstract

The invention discloses a chiral MOFs functional material. During preparation, zinc nitrate hexahydrate and L-phenylalanine are dissolved into deionized water to obtain a solution A; 1,2-bis(4- pyridyl)ethylene is dissolved into absolute methanol to obtain a solution B; the solution A and the solution B are uniformly mixed and are then transferred into a reaction kettle to be crystallized; after the reaction is completed, the reaction kettle is cooled to room temperature; filtering, washing and vacuum drying are performed; then, orange crystals of the chiral MOFs functional material are obtained. A solvent thermal synthesis method is used for synthesis; the preparation method is simple; convenience and high speed are realized; the popularization is convenient; the raw materials are cheap and can be easily obtained; the cost is low; methyl alcohol and deionized water are used as solvents; the green and environmental-friendly effects are achieved. The chiral MOFs functional material is used for the fast selective separation of racemic amino acids for the first time; the selective absorption of racemic leucine can be realized; the selective absorption on the racemic alanine can also be realized; great application prospects are realized.

Description

technical field [0001] The invention relates to chiral separation materials, in particular to a chiral MOFs functional material and its preparation method and application. Background technique [0002] Metal-organic frameworks (Metal-Organic Frameworks, MOFs) are highly ordered crystalline materials with a network structure formed by metal ions or metal clusters through multi-dentate organic ligands, because of their structural diversity , high specific surface area, high porosity and adjustability, etc., and are widely used in the fields of catalysis, separation, gas storage and optoelectronics. [0003] The preparation methods of MOFs are simple, mainly including precipitation method, hydrothermal solvent synthesis method, mixing and stirring synthesis method, microwave synthesis, ultrasonic synthesis and so on. At present, the most commonly used synthetic method for preparing chiral MOFs is the hydrothermal solvent synthesis method, that is, metal salts, organic ligands,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/29B01J20/30C02F1/28C02F101/38
CPCB01J20/226B01J20/29C02F1/285C02F2101/38
Inventor 于阿娟高煜马雪张书胜
Owner ZHENGZHOU UNIV
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